Window Sash Pivot Bar with Integrated Sealing Shields
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Solution Overview
Problem
Current tiltable double hung window sashes are complex to install on-site, requiring specialized tools and mechanisms that are not easily accessible, and lack effective sealing during installation.
Innovation Solution
A pivot bar with a tapered and blunt end, featuring top and bottom shields for sealing, is installed using a standard electric drill to create arcuate openings in the window sash, allowing easy on-site assembly and ensuring a secure, sealed fit with optional adhesive for enhanced durability and ease of use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional tilt sash mechanisms are used, then the window sash can pivot for cleaning and maintenance, but the installation and assembly becomes complex and requires specialized tools not available at ordinary work sites
Solution Approach 1:
The pivot mechanism is divided into separate components: a pivot bar with shields that can be independently installed into the sash, rather than a single complex assembled unit. This allows each component to be installed separately using simple tools
Solution Approach 2:
The pivot bar includes integrated shields that automatically cover and seal the openings in the sash when installed, eliminating the need for separate sealing operations or specialized assembly procedures
2Object-affected harmful factors
If conventional pivot mechanisms are installed, then the sash can be tilted, but the openings formed in the sash remain exposed and allow dirt, dust, and moisture infiltration
Solution Approach 1:
The pivot bar and sealing shields are combined into a single integrated component. The shields are attached to the pivot bar itself, so that one installation action simultaneously provides both the pivoting function and the sealing function, preventing dirt, dust, and moisture infiltration
Solution Approach 2:
The shields act as intermediary elements between the pivot bar and the external environment, blocking harmful factors (dirt, dust, moisture) while allowing the pivot bar to perform its rotating function
3Ease of manufacture
If simple polymeric materials are used for the pivot bar, then manufacturing cost is reduced, but durability and resistance to slipping or moving may be compromised
Solution Approach 1:
The pivot bar uses polymeric materials with added rigidity enhancements or composite construction to maintain structural integrity and prevent slipping while keeping manufacturing costs low. The shields provide additional support and sealing functionality
Solution Approach 2:
The pivot bar has varying properties along its length - the distal end is tapered for insertion while the proximal end has a knob for manipulation. The shields provide localized reinforcement and sealing at critical areas
Data Source
AI summary
A pivot bar for a double hung window sash includes an elongated member having a knobbed end for engaging a window jamb or frame. The pivot bar has vertical and horizontal shields for completely covering the first and second apertures formed in the window sash. The pivot bar is “snap-fitted” into the first and second apertures which are formed with a conventional electric drill. The first aperture formed in the side of the sash is less than a complete circle in order for the drill bit to simultaneously form the second aperture in the bottom of the sash.